Pc corruption - Need serious help

[SolidSnake76]

ok, my idiot brother did sumthing to the god damn computer cause his laptop wouldnt send out e-mail, hookin in that mini harddrive thing in the USB port on the back. and there are none on the front so dont ask me. now i keep getting this error message when i turn it on:

windows could not start bacause the following file is missing or corrupt:
windows root>\system32
toskrnl.exe.
please reinstall a copy of the above file.

and worst, the machine doesnt want to read my XP reformat disc, what should i do? and all i want is a step by step solution, dont come in here and feed me useless BS

[joejoegun]

I found this...

- Insert the Microsoft Windows XP CD. Note: If you have a recovery CD or a restore CD and not a Microsoft Windows XP CD it is likely the below steps will not resolve your issue.

- Reboot the computer, as the computer is starting you should see a message to press any key to boot from the CD. When you see this message press any key.

- In the Microsoft Windows XP setup menu press the R key to enter the recovery console.

- Select the operating system you wish to fix, and then enter the administrator password.

- Type expand d:\i386
toskrnl.ex_c:\windows\system32
You will then be prompted if you wish to overwrite the file type Y and press enter to overwrite the file.

- Type exit to reboot the computer.